Heap-based buffer overflow in Linux kernel - CVE-2026-53203
Published: June 26, 2026
Vulnerability identifier: #VU135589
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53203
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in the ivpu_ms_get_info_ioctl function when processing a metric stream info query from firmware and copying the returned data into an allocated buffer. A local user can trigger the metric stream info query with a returned size larger than the allocated buffer to cause a denial of service.
The issue involves the accel/ivpu driver metric stream get_info ioctl path.
How to mitigate CVE-2026-53203
Install security update from vendor's repository.